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(Mo'deL) S'OHWEMBERGER.

BUNG. No. 356,379. Patentd Jan. 18, 1887.

Human States P TENT @rrrcn. I

MATTHIAS SOHWEMBERGER, OF CINCINNATI, OHIO.

BUNG.

SPECIFICATION forming part of Letters Patent No. 356.379, dated January18, 1887.

I Application filed December 11, 1886. Serial No. 221,3l8. (Model) To towhom it may concern:

Be it known that I, MATrHIAs SoHwEM- BERGER, ofOincinnati,Hamiltoncounty,()hio, have invented a new and useful Improvement 5 in Bungs, ofwhich the following is a specification.

My said improved bung is of composite material-to wit, malleable iron,india rubber, and animal membrane, and is designed to be used with theconical metallic bushings which now customarily line the bung-holes ofbeerkegs.

In the accompanying drawings, Figure 1 is an elevation of my bung inposition within a metal bushing, shown in section. Figs. 2 and 3 aresections of said hung on the lines 2 2 and 3 3, respectively. Fig. 4 isan under side view of the nipple with its attached valve.

The bung-body 1, which is preferably of malleable cast-iron, has anexpanded top or head, 2, to receive the'blows of the driving-mallet andto facilitate subsequent extraction of the bung loy'a claw-bar or othersuitable instrument introduced around the neck 3. Below the said neck 3an expanded portion or collar, 4, has a circumferential groove, 5, foran india-rubber band, 6, which, when the bung is driven firmly homewithin the bushing, as shown in Fig. 4, binds tightly within thebushingand hermetically closes the keg.

7 is a downward]y-extending nipple, which is screw-threaded eXtcriorlyto receive a protecting-cap, 8, having a ventage, 9.

A T-formcd central passage, 10, is guarded at its lower extremity by aninwardly-opening valve, 11, preferably composed of some animalmembranesuch as gut or bladder. The valve 11 permits air to enter thekeg whenever the interior pressure falls below that of the externalatmosphere, but prevents any escape of the imprisoned gases.

I claim as a new article of manufacture- The composite bung. consistingof the described combination of the metallic body 1, having thecircumferential groove 5, containing the rubber band 6, andhaving theinwardly-opening valve 11 upon the nipple 7 protected by the cap 8, asset forth.

In testimony of which invention I hereunto set my hand.

MATTHIAS SCHWEMBERGER. Attest:

Gno. H. KNIGHT, E. M. WILLIAMS.

